The invention discloses a knee arthroscope operation stent, which comprises a stent body fixedly connected with an operation table, a rotating disc I fixedly arranged on the stent body, a connecting rod I, a rotating disc II and a connecting rod IV. A locating hole I is arranged at the edge of the rotating disc I, one end of the connecting rod I is hinged to the center of the rotating disc I, a location pin I is arranged on the connecting rod I, and a connecting rod II is fixedly arranged at the other end of the connecting rod I. The rotating disc II is arranged perpendicular to the rotating disc I, a far end of the connecting rod II is hinged to the center of the rotating disc II, a locating hole II is arranged at the edge of the rotating disc II, and a location pin II matched with the locating hole II is arranged on the connecting rod II. A connecting rod III is fixedly arranged on the rotating disc II, one end of the connecting rod IV is hinged to a far end of the connecting rod III, and a fixing sleeve used for fixing ankles is arranged at the other end of the connecting rod IV. Angles at various directions can be adjusted and continuously fixed by the knee arthroscope operation stent according to operation requirements, a continuously stable and reliable operation environment can be provided for medical personnel, operation quality is guaranteed, manpower resources are saved, efficiency is improved, and the knee arthroscope operation stent is simple in structure, convenient to use and easy to manufacture.